package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {


    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    //修改分类
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //AutoFill已实现
        //category.setUpdateTime(LocalDateTime.now());
        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }
    //分类分页查询
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //新增分类
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //AutoFill已实现
        //category.setUpdateTime(LocalDateTime.now());
        //category.setCreateTime(LocalDateTime.now());
        //默认status为0即禁用状态
        category.setStatus(StatusConstant.DISABLE);

        //AutoFill已实现
        //category.setUpdateUser(BaseContext.getCurrentId());
        //category.setCreateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    //启用禁用分类
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category=Category.builder()
                .status(status)
                .id(id).build();
        categoryMapper.update(category);
    }

    //根据类型查询分类
    @Override
    public List<Category> list(Integer type) {
        List<Category> categoryList = categoryMapper.list(type);
        return categoryList;
    }

    @Override
    public void deleteById(Long id) {
        Integer DishCount = dishMapper.countByCategoryId(id);
        if(DishCount>0){//表示当前分类下有菜品，无法删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        Integer SetmealCount=setmealMapper.countCategoryById(id);
        if(SetmealCount>0){//表示当前分类下有套餐，无法删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //当前分类可以删除
        categoryMapper.deleteById(id);
    }
}
